diff --git a/dukpy/babel.py b/dukpy/babel.py
index 03777ef..1d966c3 100644
--- a/dukpy/babel.py
+++ b/dukpy/babel.py
@@ -9,9 +9,9 @@ def babel_compile(source, **kwargs):
     presets = kwargs.get('presets')
     if not presets:
         kwargs['presets'] = ["es2015"]
-    with open(BABEL_COMPILER, 'r') as babel_js:
+    with open(BABEL_COMPILER, 'rb') as babel_js:
         return evaljs(
-            (babel_js.read(),
+            (babel_js.read().decode('utf-8'),
              'var bres, res;'
              'bres = Babel.transform(dukpy.es6code, dukpy.babel_options);',
              'res = {map: bres.map, code: bres.code};'),
diff --git a/dukpy/coffee.py b/dukpy/coffee.py
index d9b39c6..121133a 100644
--- a/dukpy/coffee.py
+++ b/dukpy/coffee.py
@@ -6,9 +6,9 @@ COFFEE_COMPILER = os.path.join(os.path.dirname(__file__), 'jsmodules', 'coffeesc
 
 def coffee_compile(source):
     """Compiles the given ``source`` from CoffeeScript to JavaScript"""
-    with open(COFFEE_COMPILER, 'r') as coffeescript_js:
+    with open(COFFEE_COMPILER, 'rb') as coffeescript_js:
         return evaljs(
-            (coffeescript_js.read(),
+            (coffeescript_js.read().decode('utf-8'),
              'CoffeeScript.compile(dukpy.coffeecode)'),
             coffeecode=source
         )